<?php


namespace App\Listener;


use App\Common\Utils\ResponseUtils;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\Security\Core\Exception\AuthenticationException;

class ExceptionListener implements EventSubscriberInterface
{

    /**
     * Returns an array of event names this subscriber wants to listen to.
     *
     * The array keys are event names and the value can be:
     *
     *  * The method name to call (priority defaults to 0)
     *  * An array composed of the method name to call and the priority
     *  * An array of arrays composed of the method names to call and respective
     *    priorities, or 0 if unset
     *
     * For instance:
     *
     *  * ['eventName' => 'methodName']
     *  * ['eventName' => ['methodName', $priority]]
     *  * ['eventName' => [['methodName1', $priority], ['methodName2']]]
     *
     * @return array The event names to listen to
     */
    public static function getSubscribedEvents()
    {
        // TODO: Implement getSubscribedEvents() method.
        return array(
            KernelEvents::EXCEPTION => 'onKernelException'
        );
    }

    public function onKernelException(ExceptionEvent $event)
    {
        $e = $event->getException();

        $response = ResponseUtils::error(1, $e->getMessage());
        $response->setStatusCode(Response::HTTP_INTERNAL_SERVER_ERROR);
        if ($e instanceof AuthenticationException) {
            $response->setStatusCode(Response::HTTP_UNAUTHORIZED);
        }

        $event->setResponse($response);
    }
}